Apple Blocks Older Versions of Adobe Flash Player
A high-priority update for Flash Player was released by Adobe earlier this week, which addressed an exploit revealed by Google engineer Michele Spagnuolo. Apple is making sure that users of its operating system upgrade their Flash Player web plug-in to the latest version that contains this update, as the company is now blocking older versions from functioning properly. In order to make use of Adobe Flash Player once again, users must upgrade their Flash Player web plug-in to version 18.104.22.168. For individuals running systems that are incompatible with Flash Player 14, Apple is requiring that Flash Player 22.214.171.124 be installed, which also contains the update that addresses the critical vulnerability.
Source: Mac Rumors